Medical observation system and transmission cable

Abstract

Provided is a medical observation system capable of preventing disconnection of metal cables without increasing the thickness of a braided shield wire. The medical observation system includes a transmission cable including: an optical cable having one or more optical fiber cores; a plurality of metal cables arranged around the optical cable; and a tension member made of a high-strength fiber, and disposed in parallel with an extending direction of the optical cable.

The invention claimed is: 
     
       1. A medical observation system comprising
 a transmission cable including:
 an optical cable including one or more optical fiber cores; 
 a plurality of metal cables arranged around the optical cable; and 
 a tension member made of an insulating fiber, disposed in parallel with an extending direction of the optical cable, and in a first gap between the optical cable and the metal cables or in a second gap between the metal cables and an outer periphery of the transmission cable. 
 
 
     
     
       2. The medical observation system according to  claim 1 , wherein
 the metal cables are arranged so as to form a spiral structure around the optical cable, and 
 the tension member is disposed between the optical cable and the metal cables. 
 
     
     
       3. The medical observation system according to  claim 1 , wherein a periphery of the optical cable, the metal cables, and the tension member is covered with a braided shield wire. 
     
     
       4. The medical observation system according to  claim 1 , wherein a plurality of the tension members is arranged rotationally symmetrically around the optical cable in a corresponding plurality of gaps. 
     
     
       5. The medical Observation system according to  claim 1 , wherein
 a connector is disposed at an end of the transmission cable, and 
 an end of the tension member is fixed to the connector. 
 
     
     
       6. The medical observation system according to  claim 5 , wherein
 the component included in the connector includes a first component and a second component, and 
 the tension member is fixed by being wound around the first component and clamped by the second component. 
 
     
     
       7. The medical observation system according to  claim 1 , wherein the tension member is between the optical cable and the metal cables. 
     
     
       8. The medical observation system according to  claim 1 , further comprising a shield that surrounds the optical cable, the metal cables and the tension member. 
     
     
       9. The medical observation system according to  claim 1 , further comprising a shield that surrounds the optical cable and the metal cables. 
     
     
       10. The medical observation system according to  claim 9 , wherein the second gap is between the metal cables and the shield. 
     
     
       11. The medical observation system according to  claim 9 , wherein the tension member extends through the shield. 
     
     
       12. The medical observation system according to  claim 1 , wherein an outer diameter of the transmission cable is maintained with the inclusion of the tension member. 
     
     
       13. The medical observation system according to  claim 1 , wherein the tension member is made of high-strength insulating fiber. 
     
     
       14. The medical observation system according to  claim 1 , wherein the insulating fiber has at least one of para-aramid fiber, polyethylene fiber, polyarylate fiber, and polyparaphenylene benzobis oxazole fiber. 
     
     
       15. A transmission cable comprising:
 an optical cable including one or more optical fiber cores; 
 a plurality of metal cables arranged around the optical cable; and 
 a tension member made of an insulating fiber, disposed in parallel with an extending direction of the optical cable and in a first gap between the optical cable and the metal cables or in a second gap between the metal cables and an outer periphery of the transmission cable. 
 
     
     
       16. The transmission cable according to  claim 15 , wherein a plurality of the tension members is arranged rotationally symmetrically around the optical cable in a corresponding plurality of gaps. 
     
     
       17. The transmission cable according to  claim 15 , further comprising a shield that surrounds the optical cable, the metal cables and the tension member. 
     
     
       18. The transmission cable according to  claim 15 , further comprising a shield that surrounds the optical cable and the metal cables. 
     
     
       19. The transmission cable according to  claim 18 , wherein the second gap is between the metal cables and the shield. 
     
     
       20. The transmission cable according to  claim 18 , wherein the tension member extends through the shield. 
     
     
       21. The transmission cable according to  claim 15 , wherein an outer diameter of the transmission cable is maintained with the inclusion of the tension member. 
     
     
       22. The transmission cable according to  claim 15 , wherein the tension member is made of high-strength insulating fiber. 
     
     
       23. The transmission cable according to  claim 15 , wherein the insulating fiber has at least one of para-aramid fiber, polyethylene fiber, polyarylate fiber, and polyparaphenylene benzobis oxazole fiber.